[weidatm]

Hello everyone,


I have a question creating an animation in Paraview. I computed some complex mode and included it separated in real and imaginary part as vectors 'Real' and 'Imag' in my .vtk-Paraview-File. Inside Paraview I can apply these two vectors as deformation via 'WarpByVector' by choosing 'Real' or 'Imag' in the filter. So far so good.


My goal:
Make an animation over time which uses the information of the real and imaginary parts. For the combination of real and imaginary parts I use the 'Calculator'-Filter with an expression similar to this one:

Result Array Name: Mode_compl
 Expression: (Real_X*cos(omega_X)-Imag_X*sin(omega_X))*iHat + ...*jHat + ...*kHat

I.e. I compute a new vector with the help of my deformation vectors 'Real' and 'Imag' and some value 'omega', which stems from some 'Calculator'-operation before, e.g. with the expression

Result Array Name: omega
Expression: 5*3.14*(iHat+jHat+kHat).

In this case omega would be a constant vector with all entries equal to 5*Pi.


My Question:
Is it possible to introduce some linearily increasing time-vector t in this computation and thus make omega time-dependent:

Result Array Name: omega
Expression: t*3.14*(iHat+jHat+kHat)

where t is linearily increasing? By this the phase of the complex mode would be changed and it should start oscillating.




So far I also looked in the the 'Python Calculator' and found some way of using a 'time_value'-variable. But I could not make it work as this variable would not be created or would be always zero for me, i.e. not phase change and no oscillations were present.


How would you compute this animation? Unfortunately I don't know much about Python programming. I am aware, that I could do the computations somewhere else, e.g. Matlab, create a new .vtk-File for every timestep and load all these files together in Paraview. But I figured that it could be possible with just a single .vtk-File and internal Paraview computations alone.


Thanks for the help!